Videnskabelige meddelelser

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Videnskabelige meddelelser

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related to Vincigiierria, Jordan and Evermann ;

this is seen inter

alia, in the position of the fins, position and formation of the

photophores, dentition, gill-rakers etc.

Diplophos tænia, Giinther (Fig. 14).

Of this species, we have abt. 40 specimens from a length of

17 mm (postlarva with diphycercal tail) to adult stages of 48 mm

ex. C. When the postlarva has reached a length of abt. 46 mm,

the photophores commence to form, and at the same time, a great

reduction in length takes place, with up to Vs of the total length.

The pigmentation of the postlarvæ is, as shown in the figure, very

characteristic, and remains of the postlarval pigment are found in

the adolescent stages. The specimens were taken chiefly at the

surface. In the area investigated of the Atlantic, the principal

distribution lies south of 40" N. Lat., and west of 40° W. Long,

though some specimens were found eastward to 20 "^ 36' W. Long.

Diplophos minutus, nov. sp. (Fig. 15).

Of this species we have some ten individuals, the largest meas-

uring 21 mm ex. C. The proportions etc. will be seen from the

accompanying sketch. The species seems to be more nearly re-

lated to Diplophos pacificus, Gunther than Diplophos lænia, Gun-

ther. All the specimens exhibit diffuse pigment, and have only

little of the postlarval appearance remaining. Probably, not all the

photophores have been formed on the head (cf. Diplophos tænia).

N. of fin rays: D 10-12, A 37—39, P 9, V 8, C 6 + (10

-|-9)-|-4. Gill-rakers in 1. branchial arch: 4-|-7-|-2. Photophores:

Orb. 2, Op 1 -f"2, SO 1, (there is also one other organ on the

lower jaw, a little farther back), Br 9, I O 30, VO 1 + 1 • — 12

(the foremost lies between the ventral fins), AO 28— 30, PO 1,

LO I 46—47, LO II 65—66.

The species was taken in the upper water layers, and in the

area investigated, it was only found in that part of the Northern

Atlantic which lies south of 40" N. Lat. and west of 50° W. Long.

Valenciennellus tripunctulatus, Esmark (Fig. 16).

This very characteristic species resembles, in the postlarva, the

Sternoptychid-larva B, but is easily distinguished therefrom by the

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